Territory



(No Model.)

J. H. BLAKE.

I RULER. No. 892,846. Patented Nov. 13, 1888.

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UNITED STATES l ATENT grriono RULER.

SPECIFICATION forming part of Letters Patent N 0. 392,846, dated November 13, 1888.

Application filed May 52, 1888. Serial No. 272,594.

(No model.)

To all whom it may concern:

Be it known that 1, JOHN H. BLAKE, a subject of the Queen of Great Britain, residingin Salt Lake City, in the Territory of Utah, have invented certain Improvements in Rulers, of which the following is a specification.

My invention relates to that class of rulers, for use in the eounting-room or on the desk, in which acylindrical ruler is combined with a flat beveled ruler.

My invention will be fully described hereinafter, and its novel features carefully defined in the claim.

In the drawings, whereon my invention is illustrated, Figure 1 is a plan of my ruler. Fig. 2 is an end elevation, and Fig. 3isa cross section, of same.

A is a simple cylindrical ruler, of any suitable material, and B is a fiat ruler with abeveled and graduated edge, I), which may be provided with a metal strip, 11. The flat ruler B will be of about the same length as the cylin- The two rulers are connected by two links, 0 O, pivoted to the ends of the ruler A at its axis, so that the ruler may roll or turn on said pivots as journals, and pivoted at their other ends tothe respective ends of the flat ruler B at about the middle point of the ends, so that said ruler may turn or rotate on said pivots, and thus enable either edge of the ruler 13 to be turned outward, or from the cylindrical ruler A. This pivotal and 'rotary mounting of the flat ruler enables either edge of it to be conveniently used as a ruler or for measuring.

In parallel rulers of this class, when the cylindrical part or element is used merely as a roller or wheel, the flat ruler has not been pivoted rotatively, and it has been placed so close to the cylindrical element that its inner edge, or that adjacent to the cylinder, could not be utilized. In my construction either edge of the Hat ruler may be used, and this ruler may be used with either side up. Indeed, the flat ruler may be utilized as fully as if it were not connected with the cylindrical ruler, while it serves also to hold and steady the latter when it is in use.

Having thus described my invention, l claim As an improved article of n'ianufacture, a compound ruler consisting of a cylindrical ruler, A, and a flat ruler, B, pivotally connected at their ends by two links, 0 0, said rulers being both free to rotate on their respective pivotal axes, as and for the purposes set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JOHN H. BLAKE.

\Vitnesscs:

REESE Howa'nn, BENJAMIN W. Jumnus. 

